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So you have heard about this invasive weed that has taken the UK by storm. But, what is Japanese knotweed?
Japanese knotweed (Reynoutria japonica) is an invasive weed.
But, you can identify it by the white flowers in summer, green stems with red and purple flecks and how quickly it grows. Also, new shoots appear in spring and can look similar to asparagus when they first start to grow.
To begin, the plant was originally found in Japan and controlled by natural pests and climate conditions. However, Philip von Siebold bought a sample of the plant back to Europe in the Victorian era, where it was planted in gardens, mainly to create themed areas. Although, the plant was found to grow quickly, and by the mid-1800s, was being sold by multiple sellers across the UK.
Since then, the plant has spread across the UK. As well as this, the rhizomes (underground shoots) can grow to a depth of 2 metres underground, leading to this plant returning each year.
Japanese knotweed can cause damage to building structures by targeting weak points.
Also, It can grow through cracks in masonry and buildings. From this, the plant will then expand and grow into the crack, causing further structural damage.
During the summer months, Japanese knotweed can grow up to 10cm every day and up to 10-12 feet high. In addition, Japanese knotweed is in search of moisture and due to its extreme growth can force its way through paving, walls and more.
Due to the rhizome’s resilience, animals can transport these rhizomes (via the rhizomes being moved via their feet). Also waterways, railways and main highways can transport the rhizomes. Therefore, we class all of these as high-risk areas.
Due to Japanese knotweed’s high growth rate, and the damage it can cause, you need to declare the weed on the TA6 form. Failure to do so can result in court case. Also, anti-social behaviour orders (ASBOs) and fines can also be given to individuals who are found to have knotweed in their property which then infects a neighbour’s garden.
Japanese knotweed can be very tricky to identify and remove completely.
Therefore, treatment is either a 3-year herbicide treatment, or the plant can be excavated. However, this should only be done by a suitably qualified professional.
In summary, if you need assistance with your Japanese Knotweed Removal then please contact us today!
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If you need help identifying Japanese knotweed, you first must know that it will look different depending on the current season.
See what treatment options are available for residential properties.
If you think that your neighbour has Japanese knotweed, and may potential spread to your garden, here is a step-by-step guide for tips on what to do next.
If you can't find an answer to your question, call and speak to a member of our team.
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